Blade mounting structure for linoleum and asphalt tile remover



June 16, 1953 .T. c. RUSH 2,642,272

BLADE MOUNTING STRUCTURE FOR LINOLEUM 1 AND ASPHALT TILE REMOVER 2Sheets-Sheet 1 Filed Jan. 16, 1950' Thomas 6. Rush IN VEN TOR.

June 16, 1953 1', c, RU 2,642,272

BLADE MOUNTING STRUCTURE FOR LINOLEUM AND ASPHALT TILE REMOVER FiledJan. 16, 1950 2 Sheets-Sheet 2 F 1g. 6 a R F ig; I0 Fig. I! 68 64 IThomas 6. Rush INVENTOR.

Patented June 16, l953 UNITED s'rlu'es PATENT OFFICEn- BLADE MOUNTING.STRUCTURE'FOR, Lmo- LEUM AND ASPHALT TILE REMoven Thomas C. Rush,Mansfield, Mo. Application Jamal-v16, 1950, Serial No. 138,867-

comprising a plurality of circumferentially and axially disposed bladescarried by a shaft and rotatable therewith for 'abrading, scraping orotherwise treating a surface.

Important features of this. invention reside in the provision of asurface scraper having a mobile base together with a rotor and anoperating means therefor supported upon the base, to-

gether with improved constructions of knives carried by the rotor forscraping a surface.

These, together with various ancillary features and objects which willlater become apparent as the following description proceeds, areattained by the present invention, preferred embodiments of which havebeen illustrated by way of example only in the accompanying drawings,wherein:

Figure 1 is a side elevational view, parts being broken away, showing asuitable embodiment in accordance with the principles of this invention;Figure 2 is a bottom plan view of the mobile supporting base forming apart .of the construcon of Fi ure 1 -and showil 's' more particul r y heerti al a justing mcans ofthe same;

Figure 3 s. a" diagrammatic view'illiisir-anus he adial or ircumferentillv' spaced arranse-' m rit of the kn ves or the rotor of the device;

Figur 4 is a fragmentary end view showin ne c nstruction o kn fe a ditsarran ement u on e t r shaft; Figure 5 is an end elevational 'ew of thearl lt fisi r 2 2 2 Claims. (01. 262-203 V Figure his a view taken atright angles to Figure 10;.

Figure 12 is atrragmentary elevational view showing a modifiedconstruction for mounting the blades on the rotor shaft showing adifferent construction of supporting arm and knife blade securedthereon; and. I

Fi ure 13 is a vertical transverse sectional I view taken substantiallyupon the plane indi--- cated by the section line [3- 43 of Figure '12.

- Referring now more specifically to the ac companying drawin s whereinlike numerals designate similar parts {throughout the various views,attention is directed first to Figures i and 2, wherein it will be seenthat the numeral l 0 represents generally a supporting platform or 7base which is provided with a customary handle Figu e 1s, a p an viewiii the a rieiiri ure b in cco dance with. t e e t QiFisu e F guiege-vert cal tra sve se sectionalview ak bs a tially upon the planeindicated by the section line 1-H! of Figured;

\ F gure 8 is a side e cvati n viewof one of he su po t ng arm and aknife carried, thereby; Figu 9 is a view tak n at ri ht auslcsto Fig:ure- 8;,

Figure 1,0 is alv -cw sim la o Figure 8 but howi g a modified con trucon of supporting arm and blade;

e ass d? tr 12 which, in conjunction with a, pair orfixed supportingrollers and a vertically adjustable supporting roller 16 render the basemobile as desired. T a

A suitable prime .mover of any desired character indicated at, l8, andwhich may conveniently comprise an electric motor or the like, isprovided with a driving belt 20 which serves to impart rotation to arotor indicated generally by the numeral .22.

,At its outer or forward end, the base or. platform L0 is provided witha pair of outwardly extending plate-like support brackets 24 which aredisposed in vertical parallel relation and which are provided withvertically elongated slots 26 throughwhich extend fastening bolts 28which serve to vertically adjust and secure in adjusted position journalmembers 3!] of any desired character which are thus mounted upon theadjacent or inner surfaces of the vertical support brackets 24 forvertical adjustment thereon. The above mentioned rotor assembly 22. isintended to be journaled in the journal bearingstll and to be verticallyadjustable while extending horizontally between the same in'a manherwhich will be readily apparent. An arcuateto overlie and rest upon thearcuately shaped outer surface of the brackets 24, these arcuatedsurfaces being indicated atv 36. The shield 32 is thus positioned bygravity in the position shown in Figure ,1, to thus enclose the upperportion of the rotor 22; but may be pivoted in a clockwise directionabout its pivot pins 34 to an open position, whereby access may be hadto the upper portion of the rotor-assembly. Referring now morespecifically to Figure 2, it

will be seen that the vertically adjustable supporting wheel I6 isjournaled upon one extremity of a connecting rod 38, the other end ofthis connecting rod being slidably received in a bracket 40 which thusserves to slidingly retain the end of the rod 38 to the lower surface ofthe platform ill.

A pair of supporting brackets or bearing 42 are suitably secured to thebottom surface of the base ID, and rotatably journaled therebetween acrank shaft 44 having a crank throw or crank.

45 disposed thus between the bearings 42.

means of a connecting rod cap 48, the connecting 1 rod 33 is secured tothe crank throw 46 in such a manner that by rotating the crank shaft 44through a predetermined angular movement, the

angular. relation of the connecting rod 31 with to. assume a positionfrom which the same may yield if excessive resistance is encountered bythe cutting edge 10 during rotation of the rotor.

7 Alternatively, the blade construction of Figures i. and may beemployed, the same consisting of a triangular shaped plate It having oneapex secured to the pivot pin 14, having another apex l8 constitutingits cutting edge, and having a respect to the base In may be variedwhereby the A vertical spacing of the supporting wheel IS with respectto the under surface of the, base it! may likewise'be varied to'therebyshift or adjust the inclination of the base ID with respect to the flooror other supporting surface whereby the rotor assembly 22 maybe raisedor lowered in a manner which will now be readily understood;

This rotor assembly, as shown in Figure 6, preferably comprises an axleor shaft 56 of any desired character which is journaled betweenandsupported between the two journal bearings 36 for rotation aboutahorizontal axis and for ver-' tical adjustment as above set forth. Aplurality of radially extending support arms 52 are rigidly or otherwisesecuredto the shaft 50 for rotation therewith, and the outer ends ofthese arms are provided with blades having cutting edges which areadapted to scrape or abrade the surface with which the rotor is tobeemployed. While it is within the purview of thisinvention to formthese cutting edges integral with the arms 52,, it is to be understoodthat it'is preferred to form the same separately and to detachably mountthe cutting blades upon the arms in order to obtain the benefits of asuperior material for the cutting edges and a more economical materialfor the supporting arms.

While, as shown in Figures 6 and 7, the supporting arms 52 are providedwith beveled edges or the like 54 to constitute the cutting blades, itis preferred to form the blades separate from the arms, as shown inFigures 8 and 9. For this purpose, the blades may consist of flatplates. or the like 56 which are provided with elongated slots 58 forthe receptionof fastening bolts 66 whereby the blades may be separatelyattached to and adjustably mounted upon theends of the support arms 52.

Alternatively, instead of the support arm construction disclosed inFigures 6v and 7, the arrangement shown in Figures and 11 may beemployed, this consisting of aradi-ally extending; arm 62 having a hubportion 64 adapted to be retained by pivot pins in the same manner as at14 in Figures 4 and 5. The arm 62, at its outer extremity, has aninclined portion 66 which extends backwardlyand has an edge 68 which is.disposed preferably upon a radius of the, hub 54.

As shown in Figure5, the shaft .0 may be third apex disposed to one sideof the radius joining the center of the shaft 50 with a cutting edge 18for the same purpose as set forth in connection with the arrangement ofFigures 10 and 11;.

Preferably, a multiplicity of blades is provided about the rotor shaft,and it is preferred to form this plurality of blades in an arrangementin which the blades are spaced equidistantly both axially andcircumferentially of the rotor shaft, For this purpose, as shown in thediagrammatic view in Figure 3 in conjunction with the showing of Figure6, this principle of the invention has been illustrated in connectionwith an assembly consisting of sixteen rotor blades or arms, the samebeing numbered A-P, respectively. As will be seen from Figure 6, theadjacent blades or arms A through P are disposed consecutively at evenaxial distances along the rotor shaft, and as shown in Figure 3 aredisposed at equal angular intervals about the shaft. However, bladeswhich are adjacent axially of the shaft are pref-' erably disposed innon-adjacent but in regular spaced relation circumferentially of theshaft. Thus, as will be apparent from Figure 3, each. blade is disposedat an angular interval with respect to the next axially adjacent blade,which is equivalent to 360 divided by one-half N plus 1, in which N isequal to the number of the blades.

While various other arrangements of the blades could be provided, theforegoing arrangement is particularly advantageous and effective for thepurposes intended.

In addition to the foregoing arrangements, the construction of Figuresl2 and 13 may be employed. In this. construction, the shaft 50 hasdetachably secured thereon a cylindrical drum 5| provided with aplurality of axially extending, circumferentially spaced slots 82, therebeing one such slot for each of the intended blades. The drum may beretained as by set screws, not shown, on the shaft 50. A bladesupportingarm or holder 84 in'the form of a strip vof metallic resilient materialhas a cir the blade. By this arrangement, each of the cut ting blades isresiliently mounted and carried by the rotor for rotation therewith.

Referring again to'Figure 12, it will be seen that the lots 82 extendfrom the opposite ends one end and half from the other end, the slots ineach of the two end sets being spaced at equal circumferential angles,and they slots of the two sets being alternated or staggered withrespect to each other. By this means, the coiled and angulated portionsof the spring holders may be inserted in the slots from the ends thereofand shoved axially upon the shaft, being retained thereon as by a collaror cap plate 94, which in turn is secured as by fastening screws 96 tothereby lock the cylindrical hubs of the resilient blade holderstogether in endwise alignment.

From the foregoing, the construction and operation of the device will bereadily understood and further explanation is believed to beunnecessary. However, since numerous modifica ing base and operatingmeans for a rotor, a rotor adapted to be mounted on the base andactuated by the operating means, including a shaft, a drum mounted onsaid shaft, a plurality of blades mounted on said drum for rotationtherewith, said blades being displaced on said drum at equal axial andcircumferential intervals with respect to each other, said drum havingcircumferentiallyspaced axially extending slots, a plurality of arms,each embracing said drum and having one end anchored in one of saidslots, said blades each being mounted on the other end of one of saidarms.

2. The combination of claim 1 wherein said arms consist of resilientmetal straps.

THOMAS C. RUSH.

References Cited in the file of this patent UNITED STATES PATENTS Number

